Try-square.



No. 709,759. Patented Sept. 23, |9012. P. E. EILENBERGER.

TRY SQUARE.

(Application filed Apr. 24', 1902.)

(No Model.)

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PETER E. EILENBERGER, OF BELVIDERE, NEW' JERSEY.

TEYMSGUAEE.

SPECIFICATION forming 'para of Letters Eatent No. 709,759, dated September 23, 1902.

Application tiled April 24, 1902. Serial No. 104,521. (No model.)

To (LZZ whom it may concern;

Beitknown that I, PETER E. EILENBERGER, a citizen of the United States, residing at Belvidere, in the county of Warren and State of New Jersey, have invented a new and useful Try-Square, of which the following is a specitlcation.

This invention relates to try-squares and other similar implements; and it consists in a scribing7 attachment adapted to be ap plied thereto to enable the operator to mark the Worlt upon which the implement is elnployed, and thus dispense with pencils, awls, or other scribing implements.

The attachment may be employed on any straight edge implement such as trysquares, carpenters squares, many forms of rules, and 'straight-edges-but is more particularly applicable to try-squares and carpenterssquares, and for the purpose of illustration it is shown in the drawings applied to such implements.

Figure l represents a perspective view of a try-square with the improvement applied thereto. Fig. 2 is adetail transversesectional view of the same on a somewhat larger scale. Fig. 3 is a perspective view of the scribing member detached. Fig. e is a top plan view of a modified form ofmy invention.

The blade of the try-square is indicated at 10 and the movable head at 11, the blade having a slot l2, With which the pivotbolt 13 of the head engages, so that the head may be adjusted longitudinally of the blade and set at any desired angle thereto. The inner end of the head 11 embraces the blade 10 on opposite sides, as indicated at l1 1lb, the under part 11b extending beyond the part 11a to afford additional support to `the blade and also to increase the length of the head" and correspondingly increase its effective surface.

rying the arm 1G, is moved along the channel 14 the edge 16 will cut a scribing-line in the material upon which the square is placed, as will be readily understood. Thus when the implement is adjusted upon the work the desired scribed line may be very quickly and accurately made on the material and the services of pencils, awls, or other of the usual means employed for this purpose dispensed with. The implement is thus a very valuable, convenient, and time-saving adjunct to the Workmans outfit. The same device may be attached to a carpenters square 17, as indicated in Fig. 4, by forming the channels in the blades of the square and employing the bar 15 and its attached scribing blade or arm 16 in the same manner as in the form shown in Figs. 1 and 2. When employed upon the larger square, as indicated in Fig. 4, two of the channels 14 and two of the sliding scribing implements Will generally be employed, so that either portion of the square maybe employed as may be most convenient.

The blade 10 will preferably be provided with graduations similar to arule to increase its practicability.

The device will be found very convenient and useful for joiners, cabinet-makers, pat- 'tern and model makers, and Workers in wood generally, and its presence upon the implement Will not in any way interfere with its ordinary use.

Stops 18 will preferably be attached to the blades to prevent the bars 14 from running out of the ends of the channels, and the bar 15 or the arms 16 will preferably be provided With a stud 19 to assist in operating the scribe attachment.

The proportions and form may be changed and the minor details ofthe construction may be varied Without departing from the principle `or sacrificing any of the advantages of the invention.

Having thus described my invention, What I claim is 1. A straight-edge implement having an arm provided With a dovetail channel in its upper side, parallel with its straight edge, a bar fitted and disposed to slide in said channel, and an arm 16 secured on said bar, bearing on the arm of the implement and having its outer portion bent to engage the straight edge thereof and formed with a seribing edge 16, substantially as described.

2. A straight-edge implement havingr an arm provided with a longitudinal channel 5 parallel with its straight edge, a bar iitted and disposed to slide in said channel, and a /scriher secured to said barand having a downturned blade extending across and disposed side of the arm of said implement, substantially as described.

In testimony that l claim the foregoing as my own I have hereto axed my signature in he presence of two Witnesses.

PETER E. EILENBERGER.

- Witnesses:

CHARLES E. HARRIS, CAROLINE H. BRooKFIELD. 

